eye relief with 2" Hyperion eyepieces?
Posted 11 January 2013 - 11:08 AM
Posted 11 January 2013 - 11:44 AM
Posted 11 January 2013 - 02:43 PM
... is a bit perplexing that everyone is saying i "shouldnt do that". and their material says its designed to do that.
Well, there's marketing and then there's reality.
The eyepiece will work best in the 5mm mode. It is also designed to take advantage of small changes in focal length by inserting the fine tuning rings. I'm sure at some point, someone at Baader said, hey, if I leave the 1.25" part off altogether, it doesn't look too bad! We can market that as an additional "feature"!
And of course, it DOES work, as you've seen. Depending on how long you've been observing and how picky you are about the quality of the views, it may be acceptable to you or it may not. But I doubt that working at 22mm was part of the design criteria, and it is definitely a lower quality view than the 5mm mode.
In the end though, eyepiece selection and use is a very personal thing. What works for one person won't for another. So while I would not recommend using it in the 22mm mode, I would not say "Don't do it". If you're happy with the views, that's all that matters. Fact is, eyepieces are expensive and if you don't want to invest in a longer focal length unit right now, this may be an adequate solution.
Posted 11 January 2013 - 03:08 PM
im sure it did happen that way..
it is definitely a lower quality view than the 5mm mode.
ill look closer at the sharpness and possible distortion as on the moon pic, as i can see it there.. it was almost too wide , and i was searching stars the last few nights, so i might not have noticed that. i did not appear to have any issuies focusing though.. wonder if thats due to the scope and relatively low power.
well at least they didnt lie about the eye relief which was my big question, it is generous in 5mm "mode". so much for my first 2" eyepiece. ill have to make up for that mistake
Posted 12 January 2013 - 12:40 AM
Posted 12 January 2013 - 06:04 PM
At under $20. there seemed to be no reason not to give it a try.
Thanks for sharing the shot.
Posted 14 January 2013 - 02:16 PM
from some docs i was reading:
"The M43 thread serves for adaptation of T-2 accessories for classical eyepiece projection. A stepper ring from M43 onto T-2 thread (Hyperion M43/T-2 #2958080) is to be used in this case."
Posted 14 January 2013 - 08:19 PM
Yes. I believe the T2 can be used with a standard t ring camera adapter. Not the extra wide one though. I did get the baader T ring adapter for my T3i because at the time I was not sure.
Grayhaven, Thanks. I use it for eyepiece projection not afocal. With afocal you keep the camera lens on.
You can see my setup and more pics at: http://www.flickr.co...uck-in-die-luft